PSYC 1001 Lecture Notes - Lecture 3: Agonist, Action Potential, Acetylcholine
15 Oct 2018
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Document Summary
Neurons: cells in the nervous system that transmit and receive information. Body (soma) - contains nucleus and site where neurotransmitters are manufactures. Dendrites - receives incoming messages from other cells. Axon - transmits signals from body to next cell and neuron to muscles or glands. Axon terminals - chemicals released here to next neuron (myelin sheaths) - glial cells that provides insulation for neuron to increase speed. Glial ( glue ) - cells that support neuron (eg. nourishment, insulation, information, transmission) Myelin sheath (type of glial cell) - sharp pain vs dull pain. Transmission process: resting potential, action potential, synaptic transmission, graded potentials, resting potential. When neuron is not stimulated, it is at rest. The molecules (ions, k, na) have an unequal distribution between outside and inside of the cell. At rest, na and k (+/-) flow in and out of the cell membrane but at different rates resulting in negative charge: action potential.
